Car buffer



Jan. 6, 1953 E. o. LUNDE 2,624,471

CAR BUFFER Filed Dec. 13, 1946 2 SHEETS-SHEET 2 Patented Jan. 6, 1953 CAR BUFFER.

Einar 0. Lunde, W'yckoff, N. 1., assignor to Magor Car Corporation, New York, N. Y., a corporation of Delaware Application December 13, 1946, Serial No. 716,130

3 Claims.

This invention relates to a car bufier.

Ca bufiers of the general character herein disclosed and which comprise generally cylindrical fixed and movable members in telescopic relation, are well known and some thereof have been in extensive use.

An example of such prior structures is disclosed in the U. S. patent to Ball No. 659,781, October 16, 1900.

A primary consideration in devices of this kind is that they be capable of ready assembly and dis-assembly without the use of keys or the like, and that they be such that the movable member cannot become wholly dis-assembled from the fixed member in the event of the [breakage of the spring which yieldably acts on the movable member.

While the structure of Ball, above referred to is a substantial improvement over other similar structures in that it is capable of ready assembly and dis-assembly without the use of keys or the like, the Ball structure, however, is such that in the event of spring breakage .or undue compression thereof, the fixed and movable members may become dis-assembled.

A primary object of this invention is the provision of a car buffer which includes telescopic fixed and movable members having means rigid therewith for effecting the locking of the member in operative assembled position and the members and locking means being so formed as to positively preclude dis-assembly of the members when mounted on a car.

A further object of the invention is the provision of a car buffer including telescopic relatively movable members of highly simple construction and having cooperating lugs and channels for effecting operative assembly of the members and a single spring for yieldable reaction on one of the members for absorbing shock in use of the structure.

A still further object of the invention is the provision of a car buffer which is simple in construction, rugged, effective in operation, and which is capable of manufacture at relatively low cost.

These and other objects and advantages of the invention will become apparent upon a consideration of the following detailed description when taken in connection with the accompanying drawings, wherein Fig. l is a vertical axial section of the improved bufier in accordance with a preferred embodiment thereof.

Fig. 2 is an end elevational view of the bufier as observed from the right of Fig. 1.

Fig. 3 is a front elevational view of the fixed member or housing of Fig. 4.

Fig. 4 is a vertical axial section of the housmg.

Fig. 5 is a vertical sectional view in the plane of line 5--5, Fig. 4.

Fig. 6 is a rear elevational view of the movable member, the buffer head not being shown.

Referring now in detail to the drawings, i9 designates the fixed member or housing and II designates the movable member.

The housing ID, as is indicated in Fig. 5, is of generally cylindrical form except that it terminates in a rectangular attaching plate I2 which is provided with apertures I3 for the reception of bolts to securethe floufi er to a car.

The housing I9 is diametrically enlarged intermediate its ends in the provision of a. front flange I4 and a rearward shoulder I5. The enlarged portion of the member I0 is provided with circumierentially spaced elongated lugs l6 which, as indicated in Fig. 5, extend inward to an extent fiush with the inner periphery of flange Hi. The flange I4 is provided with recesses I1 and the lugs I6 are arranged in pairs with those of each pair providing a channel I6 equal in width to each recess I1, and the recesses I? open between the lugs I6 of adjacent pairs thereof.

The movable member I I is generally cylindrical except for the buffer head It carried by the front end thereof.

The member II is provided externally thereof with circumferentially spaced lugs it of a width to be snugly received within recesses ii and the elongated channels it provided by the lugs It of each pair thereof.

The member II is provided with an internal web 26 which is engaged by one end of a heavy coil spring 2i or other cushioning means whose opposite end is adapted to engage a car to which plate i2 is secured.

Upon particular reference to Fig. 1, it will be noted that the members it and H may be easily and expeditiously assembled without overcoming the resistance of the spring 2! which in fact may not be in position during such assembly.

In assembling these members, which is done prior to attachment of the buffer to a car, member II is inserted into member It with lugs i9 alined with the recesses ll, and the lugs Eli are moved rearwardly past lugs i6, as indicated by dot and dash lines in Fig. l, whereupon member I I is rotated 45 and then moved forwardly with lugs I9 moving into the channels I6 whose forv4ard ends are closed by the inner wall of flange The spring 2| is positioned with one end thereof in engagement with the web, and such spring may be of such normal length as to be slightly compressed upon positioning the plate I2 against a car to which it is then attached and with the opposite end of the spring engaged with the car.

The shoulder I5 limits rearward movement of member II and then acts as a stop wherein lugs I9 are positioned for entry into channels I6 upon rotation of the member I I.

It will be seen from Fig. 1 that in order to move the lugs I9 completely out of the channels I6 the inner end of member I I must be moved substantially inwardly of plate I2, as indicated in dot and dash lines, but when plate I2 is secured to a car, member II cannot move to the extent indicated with the result that lugs I9 cannot be fully retracted from channels I6 and accordingly the bufier members cannot be dis-assembled when the structure is secured to a car.

A further advantage of this structure is that the heavy spring 2| need not be compressed in order to assemble the bufier members.

While I have disclosed but a single specific embodiment of my invention, such is to be considered as illustrative only, and not restrictive, the scope of the invention being defined in the sub-joined claims.

What I claim and desire to secure by U. S. Letters Patent is:

1. A car buffer comprising a housing having an inner cylindrical wall and a circumferential flange projecting inwardly of such wall at one end of the housing, a plurality of spaced pairs of elongated lugs projecting inwardly from said wall to the inner periphery of said flange and defining channels therebetween, circumferentially spaced recesses in said flange extending to the bottom thereof and disposed between the pairs of lugs, a movable cylindrical member havingcircumferentially spaced lugs receivable through said recesses into the spaces between the pairs of lugs, said housing having a shoulder spaced from the adjacent ends of said pairs of lugs a distance greater than the length of the second named lugs, whereby the latter may be moved beyond the pairs of lugs and upon rotation of the movable member be alined with said channels for movement thereinto upon axial movement of the movable member, said housing being completely open at its opposite end for movement of a. portion of said cylindrical member beyond such end in the assembly of the housing and member, said cylindrical member having an internal web adjacent the lugs thereon, and a car engaging cushioning element disposed in said cylindrical member and having one end thereof in bearing engagement with said web.

2. A car buffer according to claim 1 wherein said housing is provided with a car engaging plate surrounding said open end for attachment of the buffer to a car and wherein said movable member comprises a cylindrical portion of a length to extend beyond said plate when said second lugs are disposed beyond the ends of the pairs of lugs.

3. A car bufier according to claim 1 wherein said movable member is provided with a bufier head at one end thereof and includes an open end in substantial spaced relation to said web, said cushioning element comprising a coil spring receivable through said open end and projecting beyond same in the operative assembly of the housing, member and spring.

EINAR O. LUNDE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain Aug. 28, 1930 

